CN1292925A - Dry-type transformer having generally rectangular, resin encapsulated coil - Google Patents
Dry-type transformer having generally rectangular, resin encapsulated coil Download PDFInfo
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- CN1292925A CN1292925A CN988140500A CN98814050A CN1292925A CN 1292925 A CN1292925 A CN 1292925A CN 988140500 A CN988140500 A CN 988140500A CN 98814050 A CN98814050 A CN 98814050A CN 1292925 A CN1292925 A CN 1292925A
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
- H01F2027/2857—Coil formed from wound foil conductor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
A dry-type power distribution transformer has a generally rectangular, wound ferromagnetic metal core and a resin encapsulated, generally rectangular coil. The core has a generally rectangular core window within which is located a substantially straight section of the coil. When assembled to form a power distribution transformer, the shape of the coil's substantially straight section conforms to the shape of the core window. The transformer is inexpensive to manufacture, exhibits low resistivity and low core loss, and is lightweight, compact and reliable in operation.
Description
The present invention is relevant with transformer, more particularly, is relevant with a kind of dry-type distribution transformer, and this transformer has the winding of the basic usefulness resin-encapsulated for rectangle of a coiling feeromagnetic metal core and.
Common dry-type distribution transformer has a circular formula open winding of annular and coiling type or lamination-type silicon steel or amorphous metal iron core.The iron core of transformer is generally rectangle, constitutes a rectangular window to lay winding.The winding of annular shape often makes that relative iron core is not complementary between iron core and the winding, also is that the shape of rectangular window is not complementary with the winding cross sectional shape that is in wherein.Mismatch between this iron core and the winding makes the volume of transformer and manufacturing cost increase a lot than the strict transformer that mates.
Coiling iron core in the distribution transformer, no matter be silicon steel or amorphous metal, its cross section all is a rectangle, and is inconsistent with circular winding.And the iron core of lamination-type silicon steel transformer can be a star section, with the annular shape comparison match of Circular Winding.Owing to the amorphous metal bar cast or to cut into different width expenses very high, it is unpractical lamination-type amorphous metal core being made star section.Therefore, when manufacturing has the dry-type distribution transformer of feeromagnetic metal core (no matter being coiling type or lamination-type), the cross sectional shape of iron core (rectangle) is not complementary with the cross sectional shape (circle) of winding.The utilization of winding material was both uneconomical, and the volume of transformer is big too.
Distribution transformer is installed in the various places possibly, and bears extremely harsh environmental conditions possibly, volume particulate (dust and foul etc.), and moisture, corrosive substance etc., they all can produce injurious effects to the useful life and the performance of transformer.Open coiling winding to the influence of the harsh environment of this class without any protective action.
The invention provides a kind of dry-type distribution transformer, it has the winding of the metal-cored and basic usefulness resin-encapsulated for rectangle of coiling sections magnetic.The basic of iron core is the strict coupling of the shape that is roughly rectangle of the cross sectional shape of rectangle and resin-encapsulated winding.Because winding shape and core section shape are complementary, typical circular or Circular Winding transformer that this dry type feeromagnetic metal distribution transformer compares, manufacturing cost is lower, and resistance and loss are less, and the material of required coiling winding is less, and more compact structure.
In general, dry-type distribution transformer comprises a winding that is roughly rectangle with this straight portion of segment base with resin-encapsulated, with a feeromagnetic metal core, the latter is made by amorphous metal or silicon steel, and forms one therein and substantially be the iron core window of rectangle.The size and dimension of winding and iron core is made the shape that makes the basic straight portion of winding and the shape basically identical of iron core window.When winding and iron core group were dressed up a distribution transformer, the basic straight portion of winding was in the iron core window.Adopt resin-encapsulated can make winding not be subjected to the influence of harsh environmental condition; the insulation system of protection winding; improve the intensity of winding under short-circuit state; and since give the winding outer surface provide one smooth and uniform surperficial; make air (compulsory or convection current) to flow through glibly, thereby the cooling characteristics of winding also is improved.
The characteristics of dry-type distribution transformer of the present invention are durable and solid.Winding and core material are all saved very much, thereby greatly reduce manufacturing cost and transformer size.These features be the high user of size, price and the performance requirement to distribution transformer special wish.
By detailed description below in conjunction with accompanying drawing action, can more complete understanding be arranged to the present invention, and its advantage is also clearer and more definite, identical numeral similar elements in each accompanying drawing, wherein:
Figure 1A is the front view by the shell-type single-phase transformer of the present invention structure, among the figure with winding partly cut-away;
Figure 1B is the profile along the B-B line of Figure 1A;
Fig. 2 A is the front view by the core pattern single-phase transformer of the present invention's structure;
Fig. 2 B is the profile along the B-B line of Fig. 2 A;
Fig. 3 A is the front view by the three-phase transformer of the present invention's structure;
Fig. 3 B is the profile along the B-B line of Fig. 3 A;
Fig. 4 is with the perspective view of a basic low pressure winding for rectangle on the rectangle mandrel by the present invention;
Fig. 5 is with the perspective view of a basic high pressure winding for rectangle on the rectangle mandrel by the present invention;
Fig. 6 is that being used for encapsulating basic by the present invention is the epoxy sealing shell perspective view of the winding of rectangle;
Fig. 7 will put into the top view of epoxy sealing shell shown in Figure 6 substantially for the winding of rectangle;
Fig. 8 is the package system block diagram that is used for encapsulating winding by the present invention's structure.
Figure 1A and 2A are two kinds of patterns of first embodiment of the invention: shell-type single phase distribution transformer (Figure 1A) and core pattern single phase distribution transformer (Fig. 2 A).The shell-type single-phase transformer comprises one and is the resin-encapsulated winding 40 of rectangle and two feeromagnetic metal cores 20 substantially.Core formula single-phase transformer 10 comprises two and is the resin-encapsulated winding 40 of rectangle and a feeromagnetic metal core 20 substantially.Fig. 3 A is depicted as second embodiment of the present invention.This low middle shell-type three-phase distribution transformer 10 comprises three and is the resin-encapsulated winding 40 of rectangle and four feeromagnetic metal cores 20 substantially.Though following detailed description is at the shell-type single-phase transformer, the insider understands, it is to Fig. 2 A, 2B, and the core pattern shown in 3A and the 3B is single-phase and the shell-type three-phase transformer is suitable equally.In addition, the insider is apparent: the present invention and following detailed description to it also are applicable to other various dry-type distribution transformer structures and design.Therefore, should be used as an example rather than only be confined to this description of shell-type single-phase transformer below.
Point out that above the feeromagnetic metal that is used for making iron core 20 can be silicon steel or amorphous metal.Terminology used here " amorphous metal " is meant the metal alloy that does not have long-range ordering basically, and its feature will characterize with the peak value of X-ray diffraction intensity, qualitatively goes up that it is similar to liquid or the viewed peak value of inorganic oxide glass.
Amorphous metal alloy is fit to be used for making iron core 20 very much, because they have following composite characteristic: (a) low magnetic hysteresis loss; (b) low eddy current loss; (c) low-coercivity; (d) high magnetic permeability; (e) high saturability; (f) magnetic permeability is very little with variation of temperature.X-ray diffraction is measured, and this class alloy has at least 50% to be unbodied.Amorphous metal alloy comprises that those structural formulas are M preferably
60-90T
0-15X
10-25Alloy, wherein M be at least elemental iron, cobalt, nickel, in a kind of, T is at least a kind of in the transition metal, X is at least a kind of in nonmetalloid phosphorus, boron, the carbon.Carbon among the X, phosphorus and (or) can use below 80% aluminium, antimony, beryllium, germanium, indium, silicon and the Xi Lai of boron replace.When this class amorphous metal alloy was used as the iron core of magnetic device, its performance was more far better than common polycrystalline metal alloy commonly used.We wish that this class amorphous alloy ribbon has at least 80% to be amorphous state, preferably has the amorphous state more than 95%.
When making the amorphous alloy of iron core 20 preferably with the speed cooling of fused solution with about 10 ℃/second.There is the multiple method that everybody is familiar with to can be used to make the continuous amorphous metal band of rapid quenching.When being used as the magnetic core of amorphous metal transformer, the strip material of iron core 20 is the form of winding normally.Be cast straight to melted material on the Quench surface or in certain quenching medium, just can make this strip material easily.This technical process can reduce manufacturing cost greatly, because do not need the step through middle wire drawing or winding.
The amorphous metal alloy that is suitable for making iron core 20 has higher tensile strength, generally at 200,000 to 600,000 pounds/inch
2Between, different and different according to component, and the polycrystalline alloy that is used under the annealed condition generally is at 10,000 to 80,000 pounds/inch
2Scope in.For the very high application scenario of centrifugal force, it is very important having high-tensile, because the higher alloy of intensity can prolong the useful life of transformer.
In addition, the amorphous metal alloy that is used for making iron core 20 has high resistivity, in the time of 25 ℃, be about 160 to 180 micro-ohms-centimetre, different and different according to component.In the past the resistivity of Chang Yong material be about 45 to 160 micro-ohms-centimetre.It is very useful to being used for reducing eddy current loss under the exchange status that above-mentioned amorphous metal alloy has the high resistivity this point, and this also is the factor that core loss is reduced simultaneously.
Another advantage that adopts amorphous metal alloy to make iron core 20 is that the coercive force of its coercive force ratio essentially identical material of tenor in the past is low.Therefore can adopt more comparatively cheap iron in the iron core 20, and not need to use bigger expensive nickel.
When making iron core 20 be on the mandrel (not shown) around on continuous several circles, make strip material be in extended state and be tauted.The number of turns is selected according to the size of desired each iron core 20.The thickness of banded core material is wished in the scope of 1 to 2 mil.Because the tensile strength of used amorphous metal alloy is higher, so adopt the strip material of 1-2 mil thick also to be unlikely fracture.Obviously, strip material is relatively thinner will to make effective resistance increase, because the border of unit radical length is a lot, and eddy current must flow through these borders.
Let us continues to see Figure 1A and 1B, and a shell-type single phase distribution transformer 10 comprises an iron core one winding assembly 12, and it is made of for the encapsulation winding 40 of rectangle substantially two feeromagnetic metal cores 20 and one.Transformer 10 also comprises a base 30 and footstock 34, and bottom and top winding supports 32 and 36 are arranged respectively on it, and iron core-winding assembly 12 just is installed between these two seats.Preferably by several feeromagnetic metal bands or layer 28 coiled, its cross section is roughly rectangle (seeing Figure 1B) to each iron core 20.Each iron core 20 has two long limits 24 and two minor faces 26, and they constitute an iron core window 22 that is roughly rectangle jointly, and the straight substantially interlude 52 that is roughly the winding 40 of rectangle of the present invention just is in this window.We define the side ratio of window, and promptly the ratio on iron core 20 length limits 24,26 is the ratio of window height (promptly long limit 24) and window width (being minor face 26), and its value is preferably between 3.5 to 1 to 4.5 to 1.It is minimum that this preferred core structure make to be made iron core 20 required coiling feeromagnetic metal band or number of layers, thereby reduced the temperature gradient in the winding 40.Be added with which floor epoxy resin (not shown) to support the height of iron core 20 along long limit 24.Between beginning one deck epoxy resin each feeromagnetic metal band or layer 28 preferably submissiveer and that infiltrate formation iron core 20.Each layer epoxy resin generally wants comparatively robust a little later on, so that the long limit 24 of iron core 20 has the intensity that needs.It is Fe that iron core 20 preferably adopts chemical formula
80B
11Si
9The feeromagnetic metal band, this band can have been bought from AlliedSignal company, its trade names are METGLAS
Alloy SA-1.
The present invention generally requires winding 40 to be rectangle.But other geometry can consider that also as long as it comprises a straight basically interlude 52, and the size and dimension of this section can be put in the iron core window 22 that is roughly rectangle of iron core 20.For example, the end segment 54 that winding 40 is not in the iron core window 22 can be circular, and by and the stage casing 52 that is in the iron core window be roughly rectangle, also i.e. ellipse that mid portion is roughly straight.
Can be clear that from Figure 1B the winding 40 that is roughly rectangle of the present invention is made up of some winding coilings 42, coiling is with insulating material 44 and some cooling duct dottle pin 46 coilings (seeing Figure 4 and 5) of laying selectively.When making is roughly the winding 40 of rectangle, with the element of winding (for example wind the line 42 and insulating material 44) on a rectangle coiling mandrel 60 (seeing Figure 4 and 5), alternately winding coiling 42 and some concentric layers of insulating material 44 coileds.In a kind of preferred embodiment, insulating material 44 constitutes the interior and outermost layer of the winding 40 that winds, and provides electric insulation in 42 adjacent of winding coilings.After rectangle coiling mandrel 60 is taken out, vertically just forming and be the winding hole 56 of rectangle substantially along winding 40.
Because the wire rod of winding generally is to supply with the form of spool, twine the back materials at winding 40 and can keep a bending radius, make winding form bending or approximate ellipse because of the inertia of wire rod.But this also brings some defectives, promptly allows the manufacturing dimension of winding (especially it requires more straight interlude 52) increase, and makes winding install on the iron core 20 to being difficult to greatly.Therefore need guarantee that taking off its coiling 42 (and whole windings 40) of back at winding from coiling mandrel 60 keeps rectangle substantially.A solution provided by the invention is with being soaked with the brown paper of resin as insulating material 44 between winding coiling 42.It is 42 bonding that resin and winding wind the line, and just making coiling 42 have certain rigidity after having done, to reduce the bending tendency of wire rod.Another kind of way is to allow the shape of coiling 62 comprise metal angle 62 (seeing Figure 4 and 5), in winding coiling 42, forming the angle, and with winding on mandrel 60.The third solution is in the shape that wire rod is roughly the winding knock with wooden unit and nylon mallet rectangle around to mandrel the time.Also having a kind of method is that winding 40 is stayed on the mandrel, and all compresses the winding long leg that is between the pressing plate before intact the encapsulation at winding 40.Last a kind of method becomes the rectangle except making winding 40 substantially, can also further compress the long leg of winding 40, thereby reduce the superimposed phenomenon that to avoid as far as possible between coiling 42 and insulating material 44, producing in the superimposed section (promptly basic is straight interlude 52) to greatest extent.
For further reducing to make the size of winding 40, will not lay cooling duct cushion block 46 (thereby also not laying cooling duct 58) at the straight substantially interlude 52 of winding.This has the circle of continuous cooling duct or ring-shaped winding that tangible advantage is arranged than requiring along periphery.Therefore, only mix along peripheral discontinuous cooling duct at the latter end 54 that is the winding 40 of rectangle substantially, its position is determined by the selected cushion block of installing 46.
Insulating material 44 is dispersed in winding and winds the line between 42 adjacent each layers, electric insulation to be provided and to constitute the innermost layer of winding 40 and outermost layer (resin-encapsulated that will speak of below not considering).In a kind of preferred embodiment, insulating material 44 is one or several aromatics paper, as the Nomex of E.I.Du Pont Company
Board paper.The insider is very clear, can adopt other various insulating material and can not deviate from spirit of the present invention and purpose.
Suggestion is extended the innermost layer and the outermost layer of insulating material about 12mm beyond the longitudinal terminal surface of winding 40.In addition, the insulating material 44 that is in cooling duct cushion block 46 each limit also stretches out the about 12mm of winding overhang.With very thick epoxy resin (Part No. of producing as Maglonia company is 3126, the resin of A/B) insulating material 44 embeddings of these extensions are got up.These are used for encasing still uncured epoxy resin with epoxy-bonded extension insulation material layer 44 (below will describe in detail) in the encapsulation process of winding 40.
The cooling of dry-type distribution transformer can be cooled off by cross-ventilation or forced air and be realized.Therefore between each winding coiling, need cooling duct 58 to allow air circulate betwixt.Can be with the dottle pin 46 of cooling duct along with the coiling of winding 40 be added between the winding coiling 42, and after winding 40 is packed, dottle pin is taken away (below meeting is more detailed speak of).Because wish the coiling size of winding 40 is controlled in the iron core window 22 of the iron core 20 so that it can be packed into.Be not in the section (winding 40 is distal-most end longitudinally, as Figure 1B knows demonstration) of those windings 40 in the iron core window 22 when preferably only cooling duct dottle pin 46 being placed on the assembling transformer.Therefore that part of sizes that are in the iron core 22 of winding 40 just are controlled, and make that the size of winding 40 can less (perhaps narrower), and this makes that also the size of distribution transformer is less.Because the winding among the present invention is rectangle substantially, we can adopt along the discontinuous cooling duct 58 of rectangle winding periphery.Consider that cooling duct 58 can make the size of winding increase this fact (this is undesirable especially to the straight substantially stage casing 52 of winding), obviously needs and selectively lays cooling duct 58 and provide discontinuous cooling duct 58 along periphery.Owing to winding of the present invention 40 is basic for rectangle makes the clear-cut (circle or Circular Winding are not accomplished) of four edges, thereby can lay cooling duct 58 selectively at the latter end 54 of winding 40.
For the low pressure winding that is used in distribution transformer secondary coiling usually, its coiling 42 is the (see figure 4)s that are made of or several aluminium foils or Copper Foil.And for the high pressure winding that is used in the elementary coiling of distribution transformer usually, its coiling 42 is to be the (see figure 5) that rectangle or circular copper cash constitute by cross section.No matter be low pressure or high pressure winding, all be winding 40 on a rectangle mandrel 60, preferably with 62 1 of coiling moulds with, this mould has metal angle 64, its shape pre-determines.Of the present invention basic for the winding 40 of rectangle can be to have only a low pressure winding or a high pressure winding, also may comprise two windings of low pressure and high pressure.Will speak of in detail below, the winding 40 that winds is encased and is sealed by epoxy resin layer 50 fully.
Fig. 4 and Fig. 5 for constitute by the present invention be respectively applied for low pressure and high pressure be the winding 40 of rectangle substantially.Low pressure winding shown in Figure 4 is that winding coiling 42 (for example a copper or aluminium foil) is made on a basic coiling mandrel 60 for rectangle.For making electric insulation between coiling 42 each adjacent layer, insert insulating material 44 at interlayer.Insulating material 44 is formed the interior and outermost layer of the winding 40 that winds.By between coiling 42, adding that cooling duct dottle pin 46 comes to provide cooling duct 58 to winding 40 when the coiling winding 40.Winding 40 is packaged afterwards with dottle pin 46 taking-ups, is exactly cooling duct 58 by the dottle pin 46 formed cavitys of taking away.The manufacture method of high pressure winding 40 shown in Figure 5 is similar to the low pressure winding 40 of Fig. 4, and different is, and winding coiling at this moment 42 is a rectangle or circular copper cash, it by spirality or dish type on rectangle mandrel 60.
As shown in Figure 6, winding 40 of the present invention is to be encapsulated in the epoxy resin layer 50 with a container 70.Container 70 is by a shell of tank 72 (being divided into first and second two halves 72a and the 72b), and a container fuse 74 and a container base 76 are formed.Container fuse 74 also can be made up of the first and second two halves 74a and 74b, perhaps can be made up of the rectangle mandrel 60 that winds the line, and of the present inventionly just is wound on this mandrel for the winding 40 of rectangle substantially.The support 78 that is contained on the first and second two halves 72a and the 72b can be used in encapsulation process these two halves are associated in together.
We are with reference to Fig. 6 now, and 7,8 go through encapsulation process.The winding 40 that winds is placed in the container 70, and container preferably exceeds about winding 40 top 100mm, to allow producing contraction behind the epoxy resin cure.Then container 70 and winding 40 pack into one with vacuum source 82 and vacuum chamber 80 that epoxy resin source 84 links to each other in.By vacuum source chamber 80 is vented to about 150 torrs.With a kind of low viscosity epoxy resin, for example the trade mark of Magnolia company is 111-047, and the bisphenols A type epoxy resin of A/B injects container 70 until it is all filled with.When epoxy resin is annotated the top of container 70, with vacuum chamber 80 about 20 torrs of further finding time.Epoxy resin descends in the process of above-mentioned change if the pressure in container 80 produces, then some epoxy resin of injection to container 70 in again.In case be full of in the container 70 epoxy resin and epoxy resin face in container 70, look fixed after, epoxy resin produces an epoxy resin layer 50 with regard to beginning to solidify, and receives winding 40 fully and surrounds and seal.Behind epoxy resin cure, winding 40 is taken out from container 70, simultaneously cooling duct dottle pin 46 is taken out from winding 40.
Can will be that the winding 40 of rectangle and the feeromagnetic metal core 20 of coiling are fitted together by the basic of resin-encapsulated now, this metal-cored cross section be rectangle substantially, and an iron core window 22 that is essentially rectangle is arranged.Basically it is interior and identical substantially with the size and dimension of window 22 that the straight part 52 of winding 40 is placed in iron core window 22.
Therefore, the invention provides a kind of dry-type distribution transformer, it comprises that a cross section is that the coiling feeromagnetic metal iron core of rectangle and one are the winding by resin-encapsulated of rectangle substantially substantially.Owing to can pass through glibly through the outer surface of encapsulation winding smooth, even, the air (no matter be force or convection current) that becomes; therefore; can prevent that winding is subjected to the infringement of harsh environmental condition; the insulation system of winding is protected; the intensity of winding under short-circuit condition is improved, and the cooling characteristics of winding also is improved simultaneously.In addition, because the shape of winding and the shape of core section are complementary, dry type feeromagnetic metal distribution transformer provided by the present invention is compared with in the past the transformer with typical circular or Circular Winding, manufacturing cost is lower, resistance is less thereby loss is also little (because required coiling material is few), and volume is also little.Therefore, dry-type distribution transformer of the present invention is durable and solid, and required transformer material is more economical, so the smaller volume of low cost of manufacture and whole transformer.
Should illustrate, above to more detailed description that the present invention did and do not mean that and to strictly observe these details that on the contrary, the insider can carry out various modifications and still not exceed the determined scope of the present invention of following claim book it.
Claims (36)
1. dry-type distribution transformer comprises:
One is the winding of rectangle with the basic of resin-encapsulated, and it has this straight part of a segment base; With
A feeromagnetic metal iron core wherein has one to be the iron core window of rectangle substantially;
The size and dimension of above-mentioned winding and iron core is made the shape that makes the basic flat segments of winding and is roughly coincide with the shape of iron core window, and when winding and iron core group were dressed up distribution transformer, the basic flat segments of winding was in the iron core window.
2. dry-type distribution transformer as claimed in claim 1, wherein winding also comprises:
Some are the concentric layer of rectangle substantially, are made up of a conductive winding coiling and one deck insulating material, and the latter provides the electric insulation between each neighboring concentric layer of winding; With
Resin bed with the winding encapsulation.
3. dry-type distribution transformer as claimed in claim 2, wherein winding also comprises some and is clipped in cooling duct between adjacent each concentric layer, and their, and are in winding and do not comprise that part of of basic flat segments for the winding periphery of rectangle distributes discontinuously along basic.
4. dry-type distribution transformer as claimed in claim 2, wherein the winding coiling is selected from aluminium and one group of material of copper.
5. dry-type distribution transformer as claimed in claim 2, wherein resin bed is low-viscosity epoxy resin.
6. dry-type distribution transformer as claimed in claim 5, wherein low viscosity resin is a bisphenol A epoxide resin.
7. dry-type distribution transformer as claimed in claim 1, wherein iron core is a coiling iron core.
8. dry-type distribution transformer as claimed in claim 1, wherein iron core is made with a kind of amorphous metal alloy, and its structural group becomes M
60-90T
0-15X
10-25, wherein M is at least iron, cobalt, and a kind of in several elements of nickel, T are at least a in the transition metal, X is a nonmetalloid phosphorus, at least a in boron and the carbon, and the carbon below 80% wherein, and phosphorus and boron content can be used aluminium, antimony, beryllium, germanium, indium, silicon and Xi Lai replace.
9. dry-type distribution transformer as claimed in claim 1, wherein the ratio of two length of sides of iron core window is approximately greater than 3.5 to 1.
10. dry-type distribution transformer as claimed in claim 1, wherein the side ratio of iron core window is between 3.5: 1 to 4.5: 1.
11. dry-type distribution transformer as claimed in claim 1, wherein winding is a low pressure winding.
12. dry-type distribution transformer as claimed in claim 1, wherein winding is a high pressure winding.
13. dry-type distribution transformer as claimed in claim 1, wherein winding comprises a low pressure winding and a high pressure winding.
14. a dry-type distribution transformer comprises:
One is the winding of rectangle with the basic of resin-encapsulated, it comprises general straight substantially part, alternately be coated with one deck insulating material during making around layer of conductive material and on rectangle coiling framework, to form some is the insulating material of rectangle and the concentric layer of electric conducting material substantially, constitutes the resin-encapsulated layer with the winding encapsulation thereafter;
One is the feeromagnetic metal iron core of rectangle substantially, wherein has one to be the iron core window of rectangle substantially;
The size and dimension of above-mentioned winding and iron core is made and is made the straight substantially part of winding identical substantially with the shape of iron core window, and when winding and iron core group were dressed up distribution transformer, the basic straight portion of winding was in the iron core window.
15. dry-type distribution transformer as claimed in claim 14, wherein electric conducting material can be selected from aluminium and one group of material of copper.
16. dry-type distribution transformer as claimed in claim 14, wherein winding also comprises some and is in cooling duct between each concentric layer, and their distribute discontinuously along the periphery of basic winding for rectangle, and is in winding and does not comprise that part of of basic flat segments.
17. dry-type distribution transformer as claimed in claim 14, wherein resin bed is a kind of low viscosity epoxy resin.
18. dry-type distribution transformer as claimed in claim 17, wherein low viscosity resin is a bisphenol A epoxide resin.
19. dry-type distribution transformer as claimed in claim 14, wherein iron core is a coiling iron core.
20. dry-type distribution transformer as claimed in claim 14, wherein iron core is made by ferromagnetic metal alloy, and its structural group becomes M
60-90T
0-15X
10-25, wherein M is at least elemental iron, cobalt, and a kind of in the nickel, T are at least a in the transition metal, X is at least nonmetalloid phosphorus, a kind of in boron and the carbon, and the carbon below 80% wherein, phosphorus and boron content can be by aluminium, antimony, beryllium, germanium, steel, silicon and tin replace.
21. as dry-type distribution transformer as described in the claim 14, wherein the side ratio of iron core window is approximately greater than 3.5 to 1.
22. dry-type distribution transformer as claimed in claim 14, wherein the side ratio of iron core window is about between 3.5: 1 to 4.5: 1.
23. dry-type distribution transformer as claimed in claim 14, wherein winding is a low pressure winding.
24. dry-type distribution transformer as claimed in claim 14, wherein winding is a high pressure winding.
25. dry-type distribution transformer as claimed in claim 14, wherein winding comprises a low pressure winding and a high pressure winding.
26. one is the winding of rectangle with the basic of resin-encapsulated, it comprises a straight substantially part, it is the concentric layer of rectangle substantially that this winding comprises some, and each layer is made up of a conductive winding coiling and an insulating material, and the latter provides electric insulation for winding neighboring concentric layer; With
Resin bed with the winding encapsulation.
27. as claimed in claim 26 is the resin-encapsulated winding of rectangle substantially, wherein winding also comprises some and is clipped in cooling duct between each concentric layer, these conduits are to be that the periphery of the winding of rectangle is distributing discontinuously substantially around this, and are in winding and do not contain that part of of basic flat segments.
28. as claimed in claim 26 is in the resin-encapsulated winding of rectangle substantially, the winding coiling can be selected for use from aluminium and one group of material of copper.
29. as claimed in claim 26 is the resin-encapsulated winding of rectangle substantially, wherein resin bed is a low viscosity epoxy resin.
30. as claimed in claim 29 is the resin-encapsulated winding of rectangle substantially, wherein low viscosity resin is a bisphenol A epoxide resin.
31. as claimed in claim 26 is the resin-encapsulated winding of rectangle substantially, wherein winding is a low pressure winding.
32. as claimed in claim 26 is the resin-encapsulated winding of rectangle substantially, wherein winding is a high pressure winding.
33. as claimed in claim 26 is the resin-encapsulated winding of rectangle substantially, wherein winding comprises a low pressure winding and a high pressure winding.
Claim 34-36 vacancy.
37. dry-type transformer manufacture method as claimed in claim 36, wherein the predetermined pressure in the step (h) is about 150 torrs.
38. dry-type distribution transformer as claimed in claim 8, wherein iron core is to be Fe with structural formula
80B
11Si
9Amorphous metal alloy make.
39. dry-type distribution transformer as claimed in claim 20, wherein iron core is to be Fe with structural formula
80B
11Si
9Amorphous metal alloy make.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1998/006131 WO1999049481A1 (en) | 1998-03-27 | 1998-03-27 | Dry-type transformer having a generally rectangular, resin encapsulated coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1292925A true CN1292925A (en) | 2001-04-25 |
| CN1241215C CN1241215C (en) | 2006-02-08 |
Family
ID=22266704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB988140500A Expired - Fee Related CN1241215C (en) | 1998-03-27 | 1998-03-27 | Dry-type transformer having generally rectangular, resin encapsulated coil |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1074028A1 (en) |
| JP (1) | JP2002508585A (en) |
| KR (1) | KR100549558B1 (en) |
| CN (1) | CN1241215C (en) |
| AU (1) | AU6782998A (en) |
| BR (1) | BR9815771A (en) |
| CA (1) | CA2326328A1 (en) |
| WO (1) | WO1999049481A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109215950A (en) * | 2018-11-06 | 2019-01-15 | 江西北斗变电科技有限公司 | A kind of support construction and implementation method improving transformer anti-short circuit capability |
| CN111768960A (en) * | 2019-04-01 | 2020-10-13 | 台达电子企业管理（上海）有限公司 | Potting box and transformer |
| CN111768959A (en) * | 2019-04-01 | 2020-10-13 | 台达电子企业管理（上海）有限公司 | Transformer device |
| US11610729B2 (en) | 2019-04-01 | 2023-03-21 | Delta Electronics (Shanghai) Co., Ltd | Transformer and assembling method thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6411188B1 (en) * | 1998-03-27 | 2002-06-25 | Honeywell International Inc. | Amorphous metal transformer having a generally rectangular coil |
| JP2014161216A (en) * | 2009-05-25 | 2014-09-04 | Hitachi Industrial Equipment Systems Co Ltd | Power conditioner |
| CN103163185B (en) * | 2013-03-05 | 2014-12-31 | 江西省电力科学研究院 | Distribution transformer coil material nondestructive testing method |
| US10205318B2 (en) | 2016-01-05 | 2019-02-12 | Energo Group Canada Inc. | Method and system for reducing losses during electrical power distribution |
| BR112019004959A2 (en) | 2016-09-16 | 2019-06-25 | Energo Group Canada Inc | loss reduction for electricity distribution |
| KR102152956B1 (en) * | 2020-05-04 | 2020-09-07 | 제룡전기 주식회사 | Manufacturing method of outdoor transformer without insulation oil and outdoor transformer without insulation oil manufactured using the same |
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| US3626587A (en) * | 1970-04-06 | 1971-12-14 | Westinghouse Electric Corp | Methods of constructing electrical transformers |
| US4524342A (en) * | 1981-12-28 | 1985-06-18 | Allied Corporation | Toroidal core electromagnetic device |
| US4504813A (en) * | 1982-12-03 | 1985-03-12 | Mcgraw-Edison Company | Energy saving wound core transformer |
| JPS59121810A (en) * | 1982-12-28 | 1984-07-14 | Toshiba Corp | Foil-wound transformer |
| US4523169A (en) * | 1983-07-11 | 1985-06-11 | General Electric Company | Dry type transformer having improved ducting |
| JPH05326293A (en) * | 1992-05-21 | 1993-12-10 | Toshiba Corp | Gas insulated transformer |
| JPH06176940A (en) * | 1992-12-10 | 1994-06-24 | Toshiba Corp | Resin mold coil |
| US5359314A (en) * | 1993-07-01 | 1994-10-25 | General Electric Company | Core and coil assembly for an amorphous-steel cored electric transformer |
| JP3458119B2 (en) * | 1993-10-01 | 2003-10-20 | 株式会社ダイヘン | Wound core transformer |
| JP3462935B2 (en) * | 1995-05-31 | 2003-11-05 | 愛知電機株式会社 | Oil-filled amorphous core transformer |
| DE69711599T2 (en) * | 1996-01-11 | 2002-10-31 | Honeywell Int Inc | ELECTRIC THROTTLE WITH DISTRIBUTED GAP |
| DE69629318T2 (en) * | 1996-09-04 | 2004-06-03 | Schneider Electric Industries Sas | HIGH VOLTAGE / LOW VOLTAGE TRANSFORMER WITH THERMOPLASTIC DRY INSULATION |
-
1998
- 1998-03-27 JP JP2000538364A patent/JP2002508585A/en active Pending
- 1998-03-27 BR BR9815771-0A patent/BR9815771A/en unknown
- 1998-03-27 WO PCT/US1998/006131 patent/WO1999049481A1/en active IP Right Grant
- 1998-03-27 CN CNB988140500A patent/CN1241215C/en not_active Expired - Fee Related
- 1998-03-27 AU AU67829/98A patent/AU6782998A/en not_active Abandoned
- 1998-03-27 EP EP98913227A patent/EP1074028A1/en not_active Withdrawn
- 1998-03-27 KR KR1020007010762A patent/KR100549558B1/en not_active IP Right Cessation
- 1998-03-27 CA CA002326328A patent/CA2326328A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109215950A (en) * | 2018-11-06 | 2019-01-15 | 江西北斗变电科技有限公司 | A kind of support construction and implementation method improving transformer anti-short circuit capability |
| CN111768960A (en) * | 2019-04-01 | 2020-10-13 | 台达电子企业管理（上海）有限公司 | Potting box and transformer |
| CN111768959A (en) * | 2019-04-01 | 2020-10-13 | 台达电子企业管理（上海）有限公司 | Transformer device |
| US11610717B2 (en) | 2019-04-01 | 2023-03-21 | Delta Electronics (Shanghai) Co., Ltd | Potting box and transformer |
| US11610729B2 (en) | 2019-04-01 | 2023-03-21 | Delta Electronics (Shanghai) Co., Ltd | Transformer and assembling method thereof |
| US11610716B2 (en) | 2019-04-01 | 2023-03-21 | Delta Electronics (Shanghai) Co., Ltd | Transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999049481A1 (en) | 1999-09-30 |
| KR20010042234A (en) | 2001-05-25 |
| JP2002508585A (en) | 2002-03-19 |
| AU6782998A (en) | 1999-10-18 |
| BR9815771A (en) | 2004-04-13 |
| CA2326328A1 (en) | 1999-09-30 |
| EP1074028A1 (en) | 2001-02-07 |
| KR100549558B1 (en) | 2006-02-08 |
| CN1241215C (en) | 2006-02-08 |
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